1U73

Crystal structure of a Dimeric Acidic Platelet Aggregation Inhibitor and Hypotensive Phospholipase A2 from Bothrops jararacussu

Summary for 1U73

• Entry DOI: 10.2210/pdb1u73/pdb
• Related: 1umv
• Descriptor: hypotensive phospholipase A2 (2 entities in total)
• Functional Keywords: acidic phospholipase a2, bothrops jararacussu venom, platelet aggregation and hypotensive effects, oligomeric state, dimeric, hydrolase
• Biological source: Bothrops jararacussu (jararacussu)
• Total number of polymer chains: 2
• Total formula weight: 27400.90

Authors

Magro, A.J.,Murakami, M.T.,Soares, A.M.,Arni, R.K.,Fontes, M.R. (deposition date: 2004-08-02, release date: 2004-10-12, Last modification date: 2024-11-13)

Primary citation

Magro, A.J.,Murakami, M.T.,Marcussi, S.,Soares, A.M.,Arni, R.K.,Fontes, M.R.
Crystal structure of an acidic platelet aggregation inhibitor and hypotensive phospholipase A(2) in the monomeric and dimeric states: insights into its oligomeric state
Biochem.Biophys.Res.Commun., 323:24-31, 2004

PubMed Abstract: Phospholipases A2 belong to the superfamily of proteins which hydrolyzes the sn-2 acyl groups of membrane phospholipids to release arachidonic acid and lysophospholipids. An acidic phospholipase A2 isolated from Bothrops jararacussu snake venom presents a high catalytic, platelet aggregation inhibition and hypotensive activities. This protein was crystallized in two oligomeric states: monomeric and dimeric. The crystal structures were solved at 1.79 and 1.90 angstroms resolution, respectively, for the two states. It was identified a Na+ ion at the center of Ca2+-binding site of the monomeric form. A novel dimeric conformation with the active sites exposed to the solvent was observed. Conformational states of the molecule may be due to the physicochemical conditions used in the crystallization experiments. We suggest dimeric state is one found in vivo.

PubMed: 15351695
DOI: 10.1016/j.bbrc.2004.08.046

Experimental method

X-RAY DIFFRACTION (1.9 Å)